/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraMessageManager.h
void Unsubscribe ( const [FText](API\Runtime\Core\Internationalization\FText) & DebugNameText, const [FGuid](API\Runtime\Core\Misc\FGuid) & MessageAssetKey, [FGuid](API\Runtime\Core\Misc\FGuid) & MessageManagerRegistrationKey )